|Engine:||id Tech 1|
The player takes the role of a marine (unnamed to further represent the person playing), "one of Earth's toughest, hardened in combat and trained for action", who has been incarcerated on Mars after assaulting a senior officer when ordered to fire upon civilians. There, he works alongside the Union Aerospace Corporation (UAC), a multi-planetary conglomerate and military contractor performing secret experiments on interdimensional travel. Recently, the teleportation has shown signs of anomalies and instability, but the research continues nonetheless.
Suddenly, something goes wrong and creatures from hell swarm out of the teleportation gates on Deimos and Phobos. A defensive response from base security fails to halt the invasion, and the bases are quickly overrun by monsters; all personnel are killed or turned into zombies.
A military detachment from Mars travels to Phobos to investigate the incident. The player is tasked with securing the perimeter, as the assault team and their heavy weapons are brought inside. Radio contact soon ceases and the player realizes that he is the only survivor. Being unable to pilot the shuttle off of Phobos by himself, the only way to escape is to go inside and fight through the complexes of the moon base.
Doom is a landmark first-person shooter by id Software. It is widely recognized for pioneering immersive 3D graphics, networked multiplayer gaming, and support for custom expansions (WADs).
Ultimate DOOM is a full copy of DOOM with an additional fourth episode, titled Thy Flesh Consumed, which offers nine levels of more demon-slaying and bigger challenges.
Try and survive the original three episodes that made Doom a household name: 27 sizzling levels of the most explosive, mutant-laden, blood-spattered battle ever. Then it really blows players away with an all-new episode: Thy Flesh Coonsumed. Perfect Hatred, Sever the Wicked and seven other expert levels are so incredibly tough, users will be burnt to a crisp.
— Macintosh Multimedia & Product Registry, Volume 9, No. 4 - 1996
Highly recommended: Dan Linton's visit to id Software in 1993. The video features composer Bobby Prince giving a demo of Commander Keen and Wolfenstein 3-D, and John Romero playing an early version of Doom. Also read more at The Artful Gamer.
[2nd DL]: toast image file of the original 1995 CD, compressed as ".sit" Stuffit 5.5 format. Included in the .sit archive is a copy of the original manual, scanned to PDF. Once extracted, mount using the Virtual CD/DVD Utility, or Toast to mount or burn to CD.
[MD5 checksum & filename: 331d2d375d11c748983fb4f8581ea7d8 *ultmt-doom-mac.sit (31.46 MB)]
8 MB RAM
18 MB hard drive space
Mac OS 7.1
CD-ROM drive (2x speed recommended)
The installer on the CD image is Compact Pro based, and has issues with Mac OS 8.5 and newer. If you experience problems, you can manually install by dragging the files you need to a location on your hard drive. For example: copy "Ultimate DOOM", "DOOM.WAD" & the "Music" folder to a folder on your hard drive. Its unlikely that you will require any of the included "System Software" if your Mac is running Mac OS 7.5.5 or newer.
To run this in Mac OS X, you'll need a modern source port of the Doom engine.
A list of various OS X compatible forks and ports can be found at Doomworld.